The Double-bubble Coronal Mass Ejection of the 2020 December 14 Total Solar Eclipse
The Double-bubble Coronal Mass Ejection of the 2020 December 14 Total Solar Eclipse
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DOI：
10.3847/2041-8213/ac05ca
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
B. Boe;B. Yamashiro;M. Druckmüller;S. Habbal
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文献类型：
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作者：
B. Boe;B. Yamashiro;M. Druckmüller;S. Habbal
日全食(日全食)继续为探索日冕的磁拓扑和研究日冕物质抛射等动态事件提供了一个宝贵的平台--在更大的空间连续范围内具有比目前任何其他方法都可能实现的更高的空间分辨率。在这封信中，我们提供了从太阳表面到超过5个太阳半径的“双泡”CME结构的全面观测，这是在2020年12月14日的TSE期间拍摄的。它通过日冕的演化是在两个观测地点记录的，两个观测点的总时间相隔13分钟。对日食的观测还得到了大量空间观测的补充，其中包括：来自SDO/AIA和STEREO-A/EUVI的太阳圆盘和低日冕的极端紫外线观测，来自SOHO/LASCO-C2的白光日冕仪观测，来自STEREO-A/波和风/波的射电，以及来自GOES-16的X射线。我们还用势场源表面模型来表征磁场。这次CME事件本身特别令人感兴趣，因为它展示了日冕通道和导致双气泡结构的活动区之间的相互作用。尽管有太多的天基观测，但只有日食数据能够提供适当的背景来联系这些观测，并产生对这种独特的CME的详细研究。
Total solar eclipses (TSEs) continue to provide an invaluable platform for exploring the magnetic topology of the solar corona and for studying dynamic events such as coronal mass ejections (CMEs)—with a higher spatial resolution over a larger spatially continuous extent than is possible to achieve with any other method at present. In this Letter, we present observations of the full extent of a “double-bubble” CME structure from the solar surface out to over 5 solar radii, as captured during the 2020 December 14 TSE. Its evolution through the corona was recorded from two observing sites separated by 13 minutes in their times of totality. The eclipse observations are complemented by a plethora of space-based observations including: Extreme Ultraviolet observations of the solar disk and low corona from SDO/AIA and STEREO-A/EUVI, white-light coronagraph observations from SOHO/LASCO-C2, radio from STEREO-A/WAVES and WIND/WAVES, and X-ray from GOES-16. We also characterize the magnetic field with a potential field source surface model. This CME event itself is of particular interest, as it demonstrates interactions between a prominence channel and an active region that led to the double-bubble structure. Despite the plethora of space-based observations, only the eclipse data are able to provide the proper context to connect these observations and yield a detailed study of this unique CME.